Hydraulic pump or motor



May l5, 1923.

w. F. MAYER HYDRAULIC PUMP OR MOTOR Fjiled Nov. 412, 1919 20 fof To 'l WALDEMAR E. MAYER, or PHILADELPHIA, PENNSYLVANIA, AssIeNoR To TAYLOR- wHARToN IRoN AND s'rEEL COMPANY, or HIGH BRIDGE, NEW JERSEY, A coR- PoRA'rIoN or NEW JERSEY.

HYDRAULIC PUMP 0R MOTOR.

Application led November 12, 1919. Serial No. 337,421.'

VTo all whom z't may concern:

Be it known that I, WALDEMAR F. MAYER, y

sible in a multi-cylinder crank-pin construcy tion. f

The, invention, generally stated, consists providing the crank pin with a freely-rotatable block, and securin the plungersdirectly and rigidly to this lblock, the cylinders for the plungers carrying cross-headsserving as valves to control the admission of the motive iuid to and its discharge from the cylinders.

In the drawings: Y

Fig. 1 is a view 1n elevation, partly section, illustrating the improved {iuid gear.

Fig. 2 is a section of the same on line 2-2 of Fig. 1.

Fig. 3'is a section on line 3-3 of Fig. 1.

The improved iiuid gear comprises a cas-` ing 1, secured 1n an appropriate manner to,

a base 2. The casing, which is cylindrical in form, is constructed to provide two interiorV concentric channels 3 and 4, havingrespective outlets .5 and 6 these channels serving as the usual uid channels.

A drive shaft 7 is mounted in bearings tric with the drive shaft, and equal in number the desired number of cylinders, and are provided with channels 12V and 13 and bore 14 to .thereby provide a slide bearing for a cross-head 15. rlhe cross-head is formed with a transverse open-ing 16, in which the open-ended cylinder 17 is secured, as by a threaded connection. l

operation of the parts.

The valve casing is in openvcommunication with the channels 3 and 4,l through ports 18 and 19, respectively. the latter, leading from the channel 4, including in part a channel 20 formed in they meeting faces of the valve casing and main casing, to thereby dispose the ports 18 and 19, in their outlets within the valve casing, in the same line.

The ports 18 and 19 open above the crosshead 15, and the movement of the latter is such as to align the cylinder 17, with the respective ports 18 and 19 successively. That portion ofthe valve casing between the ports 18 and 19 constitutes an abutment,

v.adapted in what may be termed the dead center position of the plunger within the cylinder to close the cylinder.

Plungers 21 are arranged in the cylinders 17, and such plungers are connected to the crank pin in a manner to induce a valve operating function of the cross-heads 15 in the The crankpin 8 is provided with a block 22, mounted thereon through the intermediate bushing 23. The plungers 21 are terminally threaded and thus fixed cooperate with threaded openings in the block, as at 24.A h

The plungers may be flattened, as at 25, to permit yapplication or removal from the block connection, and the fluid channels. or

the outermost one thereof, may have straight portions, ,as 26, to correspond with the straight line movement ofthe cross-heads.

Thev drive shaft 7 may be provided with a gear 27, keyedthereon, whereby power may be transmitted from said shaft, or the shaft may be extended beyond the end bearing for connection with other machines to be operated.

A characteristic feature of the present structure is that the working parts are readily accessible without dismantling the w entire structure. The plungers may be readily disconnected from the crank-pin block, the cylinders and cross-heads removed from the valve casings, and the working parts thus disconnected and removed for repair or renewal without any extensive disconnection of the gear as a whole.

Having thus described the invention, what is claimed as new, is

1. A Huid gear comprising cross-heads mounted for reciprocation and serving as vvalves,facylinder removably connected to each cross-head, a plunger operative in each cylinder, and means for inducing a move- 'ment ofthe plungers tolcompel a valve serving movement of the cross-heads.

2. A fluid gear comprising cross-heads mounted for -reciprocation and serving as valves, a cylinder removably connected to each cross-head, a plunger operative in each cylinder, and a crank for inducing a movement of the plungers to compel a valve serving, movement of the cross-heads.

3. A fluid gear comprising a main casing formed with concentric interior fluid channels, a drive-shaft mounted in bearings carried bythe casing and having a crank-pin, valve-casings secured to the face of the casing and having ported communication with 4. A fluid gear comprising a circular main easing, valve-casings removably secured to the face of such main casing, each of said valve casings having a cross-head bearing beyond the face of the main casing, crossheads operative in said bearings, and means including cylinders and pistons therein for operating said cross heads for use as valves in said valve casings.

5. A fluid gear comprising a circular main casing, a drive-shaft mounted centrally thereof, v alvc-casings removably secured to the face of the main casing and having lcross-head bearings formed therein outwardly beyond the face of themain casing, plungersoperated by the drive shaft, cylinders in which the plungers operate, and

cross-heads secured to the cylinders and op- .erative in said bearings of the valve Casings,

cross-heads, and A the plungers, cylinders, valve casings being thus arranged beyond the face of the main casing for accessibility.

In testimony whereof I affix my signature.

WALDEMAR F. MAYER. 

